package com.project.shiro;

import com.project.bean.UserBean;
import com.project.service.IUserService;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.util.ByteSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class CustomRealm extends AuthorizingRealm {
    @Autowired
    private IUserService userService;
    public CustomRealm(){
        HashedCredentialsMatcher matcher=new HashedCredentialsMatcher();
        //设置加密算法
        matcher.setHashAlgorithmName("md5");
        //设置散列次数
        matcher.setHashIterations(1024);
        //设置编码为hex编码
        matcher.setStoredCredentialsHexEncoded(true);
        //设置凭证管理器
        this.setCredentialsMatcher(matcher);
    }
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        //得到登录用户
        UserBean user= (UserBean) principalCollection.getPrimaryPrincipal();
        //创建授权对象
        SimpleAuthorizationInfo info=new SimpleAuthorizationInfo();
        //添加角色
        user.getRoleList().forEach(e->{
            info.addRole(e.getRoleName());
        });
        user.getGradeList().forEach(e->{
            info.addStringPermission(e.getContent());
        });
        return info;
    }

    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
        //得到用户名
        String userName=authenticationToken.getPrincipal().toString();
        //按用户名查找用户
        UserBean user=userService.login(userName);
        if (user !=null){
            return new SimpleAuthenticationInfo(user,user.getPwd(), ByteSource.Util.bytes(user.getSalt().getBytes()),this.getName());
        }
        return null;
    }
}
